摘要
针对具有未知参数的受扰非线性系统,提出了一种带有死区修正的自适应鲁棒L2设计方法。根据参数的先验信息,通过将光滑投影算法、死区修正技术与参数自适应律结合起来,既抑制了参数的漂移、减小了计算负担,又使估计参数达到了最小。当外界干扰为零时,算法能够保证跟踪误差渐近收敛于任意设定的死区。当外界干扰不等于零时,系统满足L2干扰抑制性能指标。仿真结果进一步说明了算法的有效性。
An adaptive robust L2design method with dead -zone modification is proposed for a class of nonlinear systems with external disturbances and uncertain parameters. With priori knowledge of the bounds of the parametric uncertainties, the smooth projection method and the dead zone modification technology are incorporated into the adaptive laws to prevent parameter drifting and reduce the computation burden. The number of parameter estimates is minimal for the adaptive system. The algorithm can guarantee the tracking errors asymptotically converge to the desired dead zone if the external disturbances are zero. The system satisfies L2 disturbance rejection criterion when the external disturbances are considered.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第7期100-103,120,共5页
Journal of Chongqing University
基金
青年教师专项基金
高层次人才科研启动基金(0903005104294)
关键词
非线性系统
死区
自适应控制
干扰
Simulation nonlinear results demonstrate the effectiveness system
dead zone
adaptive control of the control algorithm
disturbance
